Fuel pump for internal-combustion engines



Feb. 3. 1925.

J. ROMEYN FUEL PUMP FOR INTERNAL COMBUSTION ENGINES Filed Nov. 1925 ELI-r1 "1 I721 van/1 0"? Ilia r Patented Feb. 3, 1925.

JEAN ROMiEYN, OF BRUSSELS, BELGIUM.

FUEL PUMP FOB INTERNAL-COMBUSTION ENGINES.

Application filed November 27, 1923.

To all whom it may concern:

Be it known that I, JEAN Ronny/N, a citizen of the Kingdom of Netherlands, and resident of Brussels, Belgium, have invented certain new and useful Improvements in or Relating to Fuel Pumps for Internal-Con hustion Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked therein, which form a part of this specification.

The present invention relates to fuel pumps for internal combustion engines in which the action of the centrifugal governor is transmitted to the pump through ashaft, which is turned through a. certain angle according to the position of the governor.

In such a mechanism, especially when several pumps are regulated by a common shaft, it is important to arrange the shaft so'thatthe governor is able to move it without encountering any appreciable resistance.

The purpose of the present invention is to obtain, when running, the entire freedom of the regulating shaft.

According to the invention the regulating shaft is supported near the pump or near each pump. in a fixed bearing lined with a tubular tit-ting. which is loose both round the shaft and in the bearing, and receives from any part of the pump oscillating movement.

in order that this invention maybe readily understood, it is shown, by way of example in the accompanying drawings, in which,

Figure 1 is a vertical sectional View, with parts in elevation, of a fuel pump embodying the invention; 2 is a horizontal section on line 2-2, Fig. 1; and Fig. 3 is a side view of a detail of Fig. 2.

In the fuel pump represented by way of example in Fig. 1, and which, in the main, is of the ordinary type a is the body of the pump, and b is the plunger or piston fitted to slide therein and actuated from the shaft 0 by means of the eccentric (Z, the rod (2 and the guide f; g is the suction valve, h the discharge valve, 2' a suction chamber into which the fuelis admitted through the pipe j, and k is the delivery pipe. The lever Z is supported on the eccentric m keyed on the shaft 71. and is oscillated by the rod 0 pivotally Serial No. 677,337.

connected to the guide p is a bearing in which the shaft n is supported, and q is a part which is fixed on a rod 9" attached'by means of the connecting rod 8 to a point of the lever Z and is so disposed as to keep the suction valve g open during part of the or oscillated, as above explained, the said forked arm n will likewise be oscillated, due to its connection therewith, with the result that the liner t will be turned or rockedifirst in one direction and then in the other on the shaft n and in the hearing y).

Supposing the piston b is at its upper dead centre and starts its downwardsstroke, the suction valve y is opened. But as the part (1 moves downwards at the same time as the piston, after the latter has accomplished a part of its stroke, the valve 9 is closed, and the fuel instead of flowing back through the valve 9 is forced through the valve 70 into the pipe is. In order to regulate the quantity of fuel delivered by the pump, it is sufficient to bring-the point at which the lever Z is supported, that is the centre of the eccentric m, higher 'orflower. This may be effected by turning the shaft a through a certain angle, said shaft be ing connected to a centrifugal governor (not shown) to be operated automatically thereas above explained, is constantly oscillated the friction is periodically reversed and exerts only a sligl'it alternative reaction upon the governor, so that when the latter is caused to move by a speed variation it encounters no additional resistance acting in a direction reverse to the direction in which the movement takes place, and hence i i acts immediately.

The arrangement according to the invention is particularly useful when there are several pumps which are regulated by the saane shaft, and the actuating eccentrics of which are set at equal angles around the actuating shaft, because in this case, the defect to be eliminated is inorepronounced since the regulating shaft is supported in a series of bearings) and the reaction transmitted to the governor from the oscillating liner sleeves (which are at a given moment in difi'erent periods of their movement) is practically negligible.

lVhat I claim is:

1. In a fuel pump, the combination of a reciprocatory piston; operating means there for; a suction valve; a governoivcontrolled shaft for regulating the operation of said valve; a fixed bearing for said sh'aft, a tubular liner fitting loosely in said bearing and loosely encircling said shaft: and means for continuously oscillating said liner relatively to said shaft and bearing to periodically reverse the direction of friction between the shaft and liner 2. In a fuel pump, the combination of a reciprocatory piston operating means therefor; a suction valve; a governor-controlled regulating' shaft; a lever fulcrumed eccentricaily on said shaft, whereby its fulcrum will be varied in conformity with the movements of the shaft, said lever being connected with the piston-operating means to be continuously oscillated by the same; connections between said lever and valve to operate the latter from the former; a fixed bearing for said shaft; and a. tubular liner fitting loosely in said bearing and loosely encircling said shaft, said liner having a connection with said lever whereby it will be continuously oscillated relatively to the shaft and bearing and will periodically reverse the direction of friction between the shaft and liner.

In a. fuel pump, the combination of a reciprocatory piston; operating means therefor; a suction valve; a governor-controlled regulating shaft; a lever fulcruined eccentrically on said shaft, whereby its fulcrum will be varied in confirmity with the movements of the shaft, said lever being connected with the piston-operating means to be continuously oscillated by the same; connections between said lever and valve to operate the latter from the former; a fixed bearing for said shaft; a tubular liner tit-- ting loosely in said bearing and loosely oncircling said shaft; and a forked arm on said liner connected with the lever to effect the continuous oscillation of the liner relative to the shaft and bearing, whereby the direction of friction between the liner and the shaft will be periodically reversed.

a. In a fuel pump, the combination of a rcciprocatory piston; operating means therefor; a suction valve; a governor-controlled regulating shaft; a member mounted on said shaft to move therewith and connected to op rate the valve; means for continuously oscillating said member; afixed bearing for said shaft; and a tubular liner fitting loosely in said bearing and loosely encircling said shaft, said liner being connected with said member to be continuously oscillated by the same relatively to the shaft and bearing and thereby periodically reverse the direct-ion of friction between said shaft and liner.

In testimony whereof I my signature in presence of two witnesses.

JEAN ROMEYN. lVitnesses MARIE DEFRABBE, LEONARD LEVA. 

